Product details designed with a new elevated aesthetic and more springy support, the tree runner go sneakers by allbirds feature the line's signature breathability for all-day comfort. With a carbon footprint of 4.11kg co2e, they feature an fsc-certified tencel™ lyocell (eucalyptus tree fiber) upper in a limited edition colorway, a sweetfoam® midsole made with sugarcane-based green eva, and a castor bean oil-based insole foam. Sku: a10612-rbescr beige fabric lining: fabric lining closure: lace-up fastening toe style: round-toe made in: vietnam fits true to size, take your normal size